512 



gin of the vein and the articulation of the foot to the body, it 

 turns at a right angle, the ends of the two other lobes passing a 

 little beyond it, and ends in a blind sac, less vertical than the 

 others, slightly ascending at the end, which lies just above the 

 insertion of the second pair of feet. The two middle lobes are 

 directed to the collective vein. Each lobe is flattened out some- 

 what and lies close to the posterior wall of the compartment in 

 which it is situated, as if wedged in between the wall, and the 

 muscles between it and the anterior portion of the compartment. 

 Each lobe also accompanies the bases of the first four tegumentary 

 nerves. I could not by injection of the gland, make out any gen- 

 eral opening 1 into the cavity of the body or any connection with 

 the hepatic or great collective vein ; any attempts to inject the 

 gland from the veins failing. The four lobes certainly end in 

 blind sacs. The lobes are irregular in form, appearing as if 

 twisted and knotted, and with sheets and bands of connective tis- 

 sue forming the sheaths of the muscles among which the gland 

 lies. Each lobe, when cut across, is oval, with a yellowish interior 

 and :i small central cavity, funning, evidently, an excretory duct. 

 The gland externally is of a bright brick red. The glandular 

 mass is quite dense, though yielding. It is singular that this con- 

 spicuous gland, though it must have engaged their attention, has 

 not been noticed by Van der Hoeven, Owen or A. Milne-Edwards 

 in their accounts of dissections of this animal. 



When examined under a Hartnack's No. 9 immersion lens and 

 Zentmayer's B eye piece, the reddish external cortical portion 

 consists of closely aggregated irregulnrly rounded nucleated cells 

 of quite unequal size, and scattered about in the interstices be- 

 tween the cells are dark reddish masses which give color to the 

 gland. They are very irregular in size and form, and twenty 

 hours after a portion of the parenchyma was submitted to micro- 

 scopic examination vibrated to and fro. I am reminded in the 

 vibrating movements of these bodies, of Siebold's (Anatomy of 

 the Invertebrates) description of similar bodies in the renal 

 organs of the Lamellibranchs, i.e., the gland of Bojanus. He 

 says in a foot-note, p. 214 (Burnett's Translation), "If the walls 

 of these organs are prepared in any way for microscopic examin- 



